def solve(n):
    ans = [[''] * n for _ in range(n)]
    races = ['H', 'E', 'D']

    if n == 3:
        return [['H', 'E', 'D'], ['H', 'D', 'D'], ['E', 'E', 'H']]

    for i in range(n):
        offset = 0 if i % 2 == 0 else 3
        for j in range(n):
            ans[i][j] = races[(j + offset) % 6 // 2]
    return ans


n = int(input())
ans = solve(n)
for row in ans:
    print(''.join(row))